RSentiment: Analyse Sentiment of English Sentences

Analyses sentiment of a sentence in English and assigns score to it. It can classify sentences to the following categories of sentiments:- Positive, Negative, very Positive, very negative,
Neutral. For a vector of sentences, it counts the number of sentences in each
category of sentiment.In calculating the score, negation and various degrees
of adjectives are taken into consideration. It deals only with English sentences.